1 out of 1000 profiles may be real. I had one date, which was just one night stand and didn't go further on. But it took me so much time to get just a few replies. Then I thought that I should have some self-respect and stop losing my time. I joined a trusted site with profile verification and all that stuff
https://j4l.com/402007
Things turned around for me there! I had several dates in one month and I found a woman I fell in love with!
It's a matter of finding a dating site that verifies profiles and doesn't let scammers in.

Is any dating site legit?

I did meet someone on tinder, but I have to swipe probably 2000 times to get a person that actually replied. I therefore believe most of the posts are fake. If you are persistent you may hook up with someone. Just be patient and realize that 95% is going to be a hookup which isn't all bad if you are needing someone in your life. Take care and good luck